1068991 has 8 divisors (see below), whose sum is σ = 1332864. Its totient is φ = 832920.

The previous prime is 1068989. The next prime is 1069001. The reversal of 1068991 is 1998601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1068991 - 2¹ = 1068989 is a prime.

It is a super-2 number, since 2×1068991² = 2285483516162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6865 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (166608).

2^1068991 is an apocalyptic number.

1068991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1068991 is a deficient number, since it is larger than the sum of its proper divisors (263873).

1068991 is a wasteful number, since it uses less digits than its factorization.

1068991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13901.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1068991 is about 1033.9202096874. The cubic root of 1068991 is about 102.2487520845.

The spelling of 1068991 in words is "one million, sixty-eight thousand, nine hundred ninety-one".